Insulating means and method of manufacturing the same.



UNITED STATES PATENT OFFICE.

GEORGE KELLY, oFHINsp-ALE, ILLINOIS. INSULATING MEANS AND METHOD. OFMANUFACTUFlING TH SAME.

Specification of Letters Patent.

latented flept. 4, 1906.

Application filed October 30, 19 05. Serial no. 285,178-

, zen of the United States, residing at Hinsdale,

in the county of Dupage and State of Illinois, have invented a new and useful Insulating Means and Method of Manufacturing the.

' and liquidglass.

ployed isrubber or pontianak, the com:

words,

Same, of which the following is a specification.

This invention relates to insulating means especially adapted for electricalwork.

One object'is to which willwithstan a high'volta' e, is fireroof, and will not shrink during t e manuacture thereof. I P

A further and im vide a novel metho of manufacture wherein the various ingredients are made to perform a pluralityof functions, said method being inex ensive to carry out artic e having the above-described desirable characteristics.

In carrying out the invention a compound is first formed of an elastic vegetable gum The gum preferably emmerci a1 name of a gum from Pontianak, Borneo,-or a combination of the two. This compound referabl consists of about five per cent. 0 gum an about ninety-five er cent. of liquid glass,by weight. By liquid glass is meant silicate of sodium, silicate of potassium, or the like, the same registering from 40 to 45 Baum. The proper pro ortion of gum is introduced into the li ui glass, and the latter acts as a solvent for t 'e former. The resulting combination is a liquid comound having excellent cementitious or adesive" qualities. Mineral -wool is then moistened with the 'above li uid binder by mixing the two together. Enough of this may be employed to make a stiff but plastic body. This body is then allowed to remain until a preliminary set has taken place, after which .the same is passed through mixingrollers to thoroughly incorporate the in edients. The material is afterward forme into sheets or molded articles, which are thereupon heated under ressure, or, in other vulcanized un er pressure, until the desired degree of hardness is attained, this vulcanization under pressure bein an important step. The result is an artic e that is capable of' withstanding a high voltage, is weather and fire proof, will not shrink in the hardening or vulcanizing process, and is suit= able in every way for insulating purposes.- Moreover, in the method of manufacture the rovide a novel article ortant object is to proand resulting in an whiter different characteristics of certain of the inof to effect the roper gradients are made use combination of parts. Thus the 11' 111 glass, which when combined with the rub er or carand makin this step very sim le and mexpensive. thermore, t e su r and l me which is contained in mineral wool combines with .the rubberor gum in the vulcanizing t p,

agent is required. 7 On .this account mineral wool'blown-from lead slag, being rich in sulfur, is perhaps preferred. This wool, more, over, being of a dark color appears better in the combination than the lig ter grades and furthermore,is, because of these features, objectionable for general use, so that it may be obtained at less 'cost. At the same time the ades can be successfully employed, particu arly if blown from metal slag. I the mineral wool is manufactured from rock, the amount of sulfur contained therein being generall mall, it sometimes becomes desirable to add this ingredient to the composition in order to secure the best results.- more, if desired, a filler of oxid zinc, wh ting, 3r other well-known material may be introuce For cheaper articles, where afire roofinsuresponding gum produces an excellent binder, serves as a solvent forsuch gum, doing away' with the necessity of an extraneous solventso that ordinarily no other vulcanizing Furtherlator is not needed, instead of t e mineral 7 W001 other fiber-such as flax, cotton, jute,

I and the like'maybe employed. In such case the same liquid binder is used and is applied to the fiber 1n the same manner as above described in connection with mineral wool. It

' will of course be understood that sulfur or other vulcanizing agent must be added to secure the proper vulcanizing of the ingredients when the vulcanizin process is performed.

Having thus descri ed my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The method of manufacturing insulatin material which consists in cornbinin liqui glass, gum and mineral wool and vii canizing the same.

2. The method of manufacturing msulat ing material, which consists in dissolving a gum in liquid glass, with mineral wool and vulcanizing t e mixture. The method of manufacturing insulat ing material, which consists in dissolvin'gan elastic vegetable gum in liquid glass, lIllXlIig mixing the com osition.

, ing material, which consists 1n forming a 2 5 izing the mixture.

the composition with mineral wool and afterward vu canizing the same.

4. The method of manufacturing insulatlng material, which consists in dissolving a gum by and in liquid glass, mixing the composition with mineral wool to form a stiff though plastic body, forming said body into the esired shape, allowing it to set, and afterward vulcanizing the same. I

5. The methodof manufacturing insulating material, which consists in dissolving elasti'c vegetable gumby and in liquid lass, mixing the composition with fiber, an canizing the mixture.

9. The method of manufacturing insulating materia which consists in dissolving an elastic vegetable gum in liquid glass, mixin the composition with fiber to form a stif? plastic body, forming said body into the desired article or articles, allowin said article or articles to set, and afterwarfvulcanizing the same under pressure.

10. As an article of manufacture, a vulcanized insulating body including fiber, vegetable gum and li uid glass.

1 1. As an artic e'of manufacture, a vulcanized insulating body includin a solution of vegetable gum and liquid g ass combined with mineral wool.

In testimony that I claim the foregoing as my own I have ereto afiixed my signature in the presence of two witnesses.

GEORGE KELLY. Witnesses:

JOHN H. SIGGERs,

GEORGE TATE.

cent. of elastic vegetable gum and ninetyfive per cent. of liquid glass, moistening a boiiy of mineral wool with said binder, and vu ing material, which consists in combining liquid glass, gum and fiber, and vulcanizing the same.

7. The method of manufacturing insulating material, which consists in dissolving a gum in liquid lass, mixingithe composition with a body of fiber, and afterward vulcan- S. The method of manufacturing insulat- 

